namespace feng3d
{
    /**
     * How particles are aligned when rendered.
     */
    export enum ParticleSystemRenderSpace
    {
        /**
         * Particles face the camera plane.
         */
        View,

        /**
         * Particles align with the world.
         */
        World,

        /**
         * Particles align with their local transform.
         */
        Local,

        /**
         * Particles face the eye position.
         */
        Facing,

        /**
         * Particles are aligned to their direction of travel.
         */
        Velocity,

    }
}